Study suggests walnuts in diet can improve endothelial functions for overweight adults

Medical researchers from the Yale-Griffin Prevention Research Center in Connecticut have found evidence suggestive that adding walnuts to one's diet can protect against diabetes and heart disease in at-risk individuals. Their original research article, "Effects of Walnuts on Endothelial Function in Overweight Adults with Visceral Obesity: A Randomized, Controlled, Crossover Trial," is now available in the Journal of the American College of Nutrition, the Official Publication of the American College of Nutrition, and a publication from Routledge.

For the study, a sample of 46 adults aged 30-75 were selected. Participants had a Body Mass Index larger than 25, and a exceeding 40 inches for men and 35 inches for women. They were also required to be non-smokers, and all exhibited one or more additional risk factors for metabolic syndrome, a precursor of diabetes and cardiovascular disease. The group was randomly assigned to two 8-week sequences of either a walnut-enriched ad libitum or an ad libitum diet without walnuts. Those chosen for the walnut diet were instructed to consume 56g of shelled, unroasted English walnuts per day as a snack or with a meal.

"We know that improving diets tends to be hard, but adding a single food is easy," explained Dr. David Katz, Director of the Yale-Griffin Prevention Research Center and lead author of the research team. "Our theory is that if a highly nutritious, satiating food like walnuts is added to the diet, there are dual benefits: the benefits of that nutrient rich addition and removal of the less nutritious foods."

The research found that daily intake of 56g of walnuts improves in with visceral adiposity. The addition of walnuts to the diet does not lead to weight gain. Further study on the topic is still suggested. "The primary outcome measure was the change in flow-mediated vasodilatation (FMD) of the ," wrote the research group. "Secondary measures included serum lipid panel, fasting glucose and insulin, Homeostasis Model Assessment–Insulin Resistance values, blood pressure, and anthropometric measures. FMD improved significantly from baseline when subjects consumed a walnut-enriched diet as compared with the control diet. Beneficial trends in systolic blood pressure reduction were seen, and maintenance of the baseline anthropometric values was also observed. Other measures were unaltered."

More information: www.tandfonline.com/doi/full/1… 315724.2012.10720468

add to favorites email to friend print save as pdf

Related Stories

Walnut diet slows tumor growth in mice

Jan 25, 2012

(Medical Xpress) -- Mice genetically programmed to develop prostate cancer had smaller, slower growing tumors if they consumed a diet containing walnuts, UC Davis researchers report in the current issue of the British Jo ...

Walnuts, walnut oil, improve reaction to stress

Oct 04, 2010

A diet rich in walnuts and walnut oil may prepare the body to deal better with stress, according to a team of Penn State researchers who looked at how these foods, which contain polyunsaturated fats, influence ...

Recommended for you

Abdominal obesity ups risk of hip fracture

Feb 27, 2015

(HealthDay)—Abdominal obesity is associated with increased risk of hip fracture, according to a study published in the March issue of the Journal of Internal Medicine.

Does traffic noise increase the risk of obesity?

Feb 27, 2015

There is an association between road traffic noise and the risk of obesity among people who are particularly sensitive to noise, according to a study from the Norwegian Institute of Public Health.

Impact of a supermarket on children's diets

Feb 26, 2015

Locating full-service supermarkets within neighborhoods considered to be "food deserts" may not result in healthful dietary habits or reductions in childhood obesity—at least in the short term, according to a new study ...

Seeking solutions for the impact of obesity stigma

Feb 26, 2015

Arizona State University medical anthropologist and President's Professor Alexandra Brewis Slade says that even as more and more Americans find themselves carrying extra weight, the stigma attached to being ...

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.